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Han Seungchul,Sung Pil Soo,Park Soo Young,Kim Jin Woong,Hong Hyun Pyo,Yoon Jung-Hee,Chung Dong Jin,Kwon Joon Ho,Lim Sanghyeok,Kim Jae Hyun,Shin Seung Kak,Kim Tae Hyung,Lee Dong Ho,Choi Jong Young 거트앤리버 소화기연관학회협의회 2024 Gut and Liver Vol.18 No.5
Local ablation for hepatocellular carcinoma, a non-surgical option that directly targets and destroys tumor cells, has advanced significantly since the 1990s. Therapies with different energy sources, such as radiofrequency ablation, microwave ablation, and cryoablation, employ different mechanisms to induce tumor necrosis. The precision, safety, and effectiveness of these therapies have increased with advances in guiding technologies and device improvements. Consequently, local ablation has become the first-line treatment for early-stage hepatocellular carcinoma. The lack of organized evidence and expert opinions regarding patient selection, preprocedure preparation, procedural methods, swift post-treatment evaluation, and follow-up has resulted in clinicians following varied practices. Therefore, an expert consensus-based practical recommendation for local ablation was developed by a group of experts in radiology and hepatology from the Research Committee of the Korean Liver Cancer Association in collaboration with the Korean Society of Image-Guided Tumor Ablation to provide useful information and guidance for performing local ablation and for the pre- and post-treatment management of patients.
Han Seungchul,Sung Pil Soo,Park Soo Young,Kim Jin Woong,Hong Hyun Pyo,Yoon Jung-Hee,Chung Dong Jin,Kwon Joon Ho,Lim Sanghyeok,Kim Jae Hyun,Shin Seung Kak,Kim Tae Hyung,Lee Dong Ho,Choi Jong Young 대한영상의학회 2024 Korean Journal of Radiology Vol.25 No.9
Local ablation for hepatocellular carcinoma (HCC), a non-surgical option that directly targets and destroys tumor cells, has advanced significantly since the 1990s. Therapies with different energy sources, such as radiofrequency ablation, microwave ablation, and cryoablation, employ different mechanisms to induce tumor necrosis. The precision, safety, and effectiveness of these therapies have increased with advances in guiding technologies and device improvements. Consequently, local ablation has become the first-line treatment for early-stage HCC. The lack of organized evidence and expert opinions regarding patient selection, pre-procedure preparation, procedural methods, swift post-treatment evaluation, and follow-up has resulted in clinicians following varied practices. Therefore, an expert consensus-based practical recommendation for local ablation was developed by a group of experts in radiology and hepatology from the Research Committee of the Korean Liver Cancer Association in collaboration with the Korean Society of Image-guided Tumor Ablation to provide useful information and guidance for performing local ablation and for the pre- and post-treatment management of patients.
Design and Analysis of the DC–DC Converter With a Frequency Hopping Technique for EMI Reduction
Huynh, Hai Au,Han, Youngbong,Park, Sanghyeok,Hwang, Jisoo,Song, Eunseok,Kim, SoYoung IEEE 2018 IEEE transactions on components, packaging, and ma Vol.8 No.4
<P>As more circuit functions are integrated within a single die or small integrated package, the number of electromagnetic interference (EMI) problems caused by dc–dc converters is growing. In this paper, the dominant electromagnetic emission source on the dc–dc converter is identified by analyzing the power spectrum of the nodes. The noise scanner method is applied to a packaged single-chip prototype dc–dc converter. The results show that the dominant source of electromagnetic emission is the switching node of the converter, not the output node. The frequency hopping technique (FHT) is applied to the dc–dc converter to reduce the emission at the switching node, and its effectiveness is analyzed mathematically and experimentally. The mathematical model of FHTs is proposed to analyze its effectiveness in reducing EMI, and the optimal design using the FHT and dead-time control is fabricated with 0.18- <TEX>$\mu \text{m}$</TEX> CMOS technology. The measured power spectrum reduction by using the optimal FHT design and dead-time control at the switching node is 16 dB. The EMI reduction amount of the proposed design measured by the IC-stripline method is 12.6 dB at the fundamental switching frequency.</P>